sqlpp::optional is an alias for std::optional for C++17 and beyond.
Otherwise, it is a simple and incomplete backport.
For older versions of C++, the library offers simple back
Similar for string_view and span.
Before this change, sqlite3::connection::execute silently
ignores statements after the first one (separated by semicolon).
After this change, trailing statements are detected and an
sqlpp::exception is thrown.
This change also adds documentation to other connectors indicating
that execute is supposed to be used with single statements only,
even though it is possible to do otherwise.
* Document the connector API method is_transaction_active()
* Move mysql::connection_base::is_transaction_active() to the other transaction-handling methods.
* Add more tests for mysql::connection::is_transaction_active()
* Add postgresql::connection_base::is_transaction_active()
* Add tests for postgresql::connection_base::is_transaction_active()
* Change the type of the SQLite3 transaction status from transaction_status_type to a boolean flag.
* Add sqlite3::connection_base::is_transaction_active()
* Add tests for sqlite3::connection_base::is_transaction_active()
* When closing a transaction do it in the following order: report (if any), execute SQL command, set transaction active flag to false.
* Replace connection handle method check_connection() with is_connected() and ping_server()
* When a connections is fetched from a pool perform a validity check which can be one of none, passive or ping.
* Add the methods is_connected() and ping_server() to the connection template class.
* Remove unused #include and add mising #include.
* Add tests for the connection methods is_connected() and ping_server().
